Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o Recorde Geral desde o Início do Big 12 ser ou, 27-3?
 ###Tabelas: CREATE TABLE west_australian_football_league_2001_–_ (west_australian_football_league_2001_–__id AUTO_INCREMENT PRIMARY KEY, Season INT, Premiers VARCHAR, Runners Up VARCHAR, Score VARCHAR, Captain VARCHAR, Coach VARCHAR, Simpson Medal VARCHAR, Venue VARCHAR, Attendance INT, Umpires VARCHAR) CREATE TABLE pga_tour_wins_15 (pga_tour_wins_15_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE records_1951–1976 (records_1951–1976_id AUTO_INCREMENT PRIMARY KEY, Time VARCHAR, Athlete VARCHAR, Nationality VARCHAR, Location of race VARCHAR, Date VARCHAR) CREATE TABLE record_vs._big_12_opponents (record_vs._big_12_opponents_id AUTO_INCREMENT PRIMARY KEY, Oklahoma vs. VARCHAR, Overall Record VARCHAR, at Norman VARCHAR, at Opponent's Venue VARCHAR, at Neutral Site VARCHAR, Last 5 Meetings VARCHAR, Last 10 Meetings VARCHAR, Current Streak VARCHAR, Since Beginning of Big 12 VARCHAR) CREATE TABLE most_games_for_each_club (most_games_for_each_club_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Games VARCHAR, Player VARCHAR, Club VARCHAR, Career span VARCHAR)  
SELECT Overall Record FROM record_vs._big_12_opponents WHERE Since Beginning of Big 12 = ou, 27-3